Clinical-thermometer casing.



D. G. MoLEAN.

OLINIOAL THERMOMETER CASING.

APPLIOATION FILED JULY 28, 1912.

Patented Apr. 29, 1913.

III u n bmcld h4 fzm 1mm LULUMDIA PLANOGRAPH co., WASHINGTON. D. c.

' when inserted in through one end or the bottom of the casing DONALD G.MCLEAN, OF BOSTON, MASSACHUSETTS, ASSIG'NC'R' TO THE RANDALL- FAIGHNEYCOMPANY, OF BOSTON, MASSACHUSETTS, A CORPORATION OF MASSA- GHUSETTS.

" OLINICAL-THERMOI/IETER CASING.

Patented Apr. 29, 1913.

Serial No. 711,063.

1 060 553 Specification of Letters Patent.

Application filed July 23, 1912.

mometer, instead of being secured within the casing by screwing its headinto the top of the casing, may be held in place within the casing byany other well known means.

Within the casing is arranged a spring 11.,

To all whom it may concern Be it known that I, DONALD Gr. MOLEAN, acitizen of the United States, residing at Boston, in the county ofSuifolk and State of Massachusetts, have invented a new and usefulClinical Thermometer Casing, 0 which the following is a specification,reference being had therein to the accompanying drawings.

This invention relates to casing for thermometers, especially clinicalthermometers, and has for its object the providing of a casing of simpleconstruction having means for utilizing centrifugal force to return themercury in the thermometer back into the bulb after use.

I accomplish the foregoing object by providing a casing of any suitableand convenient form having arranged therein a spring, one end of whichis secured to the casing and the other end of which projects which isfastened to the casing in any suitable manner as by a hook 12. Thebottom 13 of the casing is open and the other end of the spring projectsthrough the open bottom and is turned several times to form a loop 1 1the plane of which is parallel to the longitudinal axis of the spring orperpendicular to a transverse section of the casing. Instead of formingthe loop from the end of the spring, it may be made from any suitablematerial and mounted on the end of the spring. After the spring has beenmounted within the casii'ig, the edge of the bottom of the casing may beturned inwardly to make a smooth finish.

When not in use the thermometer is car ried in the casing as shown inFig. 1, the casing being adapted to be carried in the pocket. The springserves as an additional protection to prevent breakage or injury to thethermometer. After the thermometer has been in use and it is desired toreturn the mercury to the bulb, the casing may be held in any suitableposition, either as shown in Fig. 2 or the reverse with the loop end ofthe casing uppermost, and the thermometer is inserted in the loop andturned several times to torsionally wind up the spring. It is thenreleased and the torsional strain causes the thermometer to be whirledaround rapidly with the result that the mercury is returned to the bulbby centrifugal force. The thermometer may then be withdrawn from theloop and returned to the casing.

It is to be observed that this construction is of extreme simplicitywhich permits it to be made at a very low cost, without reducing l itse'tliciency in producing the desired result. hile the preferredembodiment of the in the form of a loop. The thermometer the loop andturned several times to torsionally wind up the spring is released withthe result that the spring causes the thermometer to be thrown aroundrapidly and the centrifugal force causes the thread of mercury to returnto the bulb.

In the accompanying drawings illustrating the preferred form of theinvention, Figure 1 is a general view of a casing constructed inaccordance with my invention showing a thermometer mounted therein, apart of the casing being brokcn away to show the interior construction;Fig. '2 is a longitudinal sectional view of the casing showing thethermometer mounted in the loop on the spring in position for throwingdown the mercury into the bulb; Fig. 3 is an end view looking upwardlyin Fig. 1, and Fig. e is a similar end view showing the ther mometer inthe same position as in Fig. 2.

In the illustrated embodiment of the invention is shown a casing 5adapted to hold a clinical thermometer 6 of usual form and to be carriedin the pocket or elsewhere. The top 7 of the casing is open and providedwith an interior thread 8 and the thermometer has a head 9 having athreaded portion 10 to engage the interior thread in the. casing whenthe thermometer is not in use and is inserted therein as shown inFig. 1. The head of the thermometer may be made in any suitable form sothat the therpresent invention has been illustrated and described, it isto be understood that the present invention is not limited to the exactdetails of construction shown and described but may be otherwiseembodied within the spirit of the invention and the scope of thefollowing claims.

What I claim is:

1. A. thermometer casing comprising a tubular body open at one end and ahelical preferably in helical form, the upper end ofof Which is turnedto form a loop the plane spring Within said body, said spring having oneend secured to said body at or near the opening thereof and the otherend projecting out through the closed end of said body and turned toform a loop for holding a thermometer.

27 A thermometer casing having an in terior helical spring, one end ofwhich is secured Within the casing and the other end said tubular body,oneend of said spring being fastened to the casing at the open endthereof and the other end of said spring passing through the other endof said 7 and being formed into a loop outside of said casing; said loopbeing so arranged that a thermometer may be inserted therein and rotatedwhen the spring is Wound up and released.

In testimony whereof, I hereunto set my hand in the presence of twosubscribing witnesses, this the nineteenth day of July, 1912.

DONALD G. MOLEAN.

of said loop being wrperulicular to a cross section of the casing, saidloop being outside of said casing.

3. A thermon'ieter casing con'iprising a tubular body open at one end toreceive and hold a thermometer, a helical spring Within itnesses E. R.BRAoKE'r'r A. L. HAYDEN.

of this patent may be obtained for five cents each, by addressing theCommissioner of Patents,

Washington, D. G.

(Jr pies casing

